All reports of unknown-debconf-priority for the archive. The extended description of this tag is:

The given maintainer script calls db_input or or db_text with a first argument that doesn't match one of the known priorities. The supported priorities are low, medium, high, and critical.

Refer to the debconf-devel(7) manual page for details.

Severity: important, Certainty: certain

Check: debconf, Type: binary, udeb, source

This tag has not been emitted in any package tested by Lintian.